Defines the time period (usually in 2ms units) that the backlash acceleration remains effective.
, cycle power, move to the physical home, and set it back to fanuc parameter 1860 full
Officially known as the (or sometimes referred to as the linear acceleration time constant for each axis), Parameter 1860 directly controls how aggressively your machine’s axes accelerate during a cutting feed move. Getting this value wrong can lead to servo lag alarms, poor corner finishes, or even mechanical damage. Defines the time period (usually in 2ms units)
To understand 1860, we must first understand the Grid Method. When you perform a Zero Return (often written as G28 or manually pressing the reference return button), the machine does not simply "know" where zero is. Instead, it moves toward a Deceleration Dog (physical limit switch). Once it hits the dog, the axis decelerates and searches for the first "Grid Point" of the servo motor's encoder. Parameter 1860 tells the control to shift that Grid Point by a specific amount. To understand 1860, we must first understand the Grid Method
Typically, parameter 1860 is set to a value between 0 and 100, where:
If Parameter 1860 is set incorrectly (e.g., after a servo swap or battery backup loss), the following issues will occur: